Effect of Aqueous Dynamics on Gas Behavior Following Retinal Reattachment Surgery.

Autor: Neffendorf JE, Guillemaut JY, Hutter JC, Ho J, Williamson TH
Jazyk: angličtina
Zdroj: Ophthalmic surgery, lasers & imaging retina [Ophthalmic Surg Lasers Imaging Retina] 2020 Sep 01; Vol. 51 (9), pp. 522-528.
DOI: 10.3928/23258160-20200831-07
Abstrakt: Background and Objective: To determine how the gas concentration in air required to achieve full postoperative vitreous cavity fill varies in different aqueous outflow states.
Materials and Methods: A mathematical model was used to estimate gas dynamics. The change in gas bubble volume over time was calculated in an eye with normal aqueous outflow, ocular hypertension (OHT), and OHT with apraclonidine treatment.
Results: The concentration required was higher for all gases to achieve a full postoperative fill in OHT eyes versus normal eyes. Optimal gas concentrations were 22.6% for SF 6 , 13.9% for C 2 F 6 , and 11.6% for C 3 F 8 . Despite this, in OHT, the fill achieved was 95%, 95%, and 94% for SF 6 , C 2 F 6 , and C 3 F 8 , respectively. With apraclonidine, percentage fill improved for all gases.
Conclusions: This is the first study to show aqueous outflow affects bubble size and indicates eyes with reduced outflow are at risk of underfill. This can ultimately affect surgical success. [Ophthalmic Surg Lasers Imaging Retina. 2020;51:522-528.].
(Copyright 2020, SLACK Incorporated.)
Databáze: MEDLINE
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